Archive.org hosts plenty of Nintendo content, they just don't show it off - I assume that is exactly because Nintendo is the only one of the orgs you listed tha

Archive.org hosts plenty of Nintendo content, they just don't show it off - I assume that is exactly because Nintendo is the only one of the orgs you listed that still goes after people hosting their 30 year old games, because they know full well that they can rip their fans off to turn them into cash again every 4 years. When ROMs are more than a quick Google away, and they have been for a period of time last year until new ROM sites popped up, spending 45€ on some lousy "Nintendo vault" remakes is getting quite a bit more attractive.